Radiator



May 1, 1934.

H. JAKFFE RADIATOR Filed OCM 19. 1932 Patented May i,

narran r man hat

recaer:

anotaron Harry Jaffe, Uhicago, iii.. assigner to Sears, Roebuck and Co., Chicago, liill., a corporation or New Yori:

Application @ctober i9, 11932, Serial No. 638,443

d Claims.

This invention relates to heat-exchange and air-conditioning apparatus, as, for example, radiators for heating rooms in dwellings and other buildings, and apparatus for cooling rooms. The

55 invention relates particularly to the fins employed to facilitate the conduction of heat from A or to a sourceof heating or cooling uid. As

heretofore commonly constructed, such fins have been made of a single thickness of thin sheet l@ copper, the fin being either iiat or corrugated, but in either case being readily deformable by accident or careless use so as not to be regularly spaced along the steam or other pipe on which they are mounted. When thus bent out of proper relation to one another the eniciency of the radiating unit is reduced. Such fins also have produced a relatively great increase in the weight of the radiating unit. I

'Various other forms of hns have been proposed, but they have been objectionable on account of ineniciency, weight, and expense.

One or the objects of my invention is to produce a heat-conducting nn which shall be highly efficient, light in weight, sufficiently rigid so as not to be readily deformabie, and relatively'inexpensive.

Another object of thefinvention is to provide an improved form of radiator of the baseboard or floorline type. Y

inthe accompanying drawing, Figure l is a perspective view of a radiator embodying my invention. Fig. 2 is a transverse vertical sectional view of the radiator. Fig. 3 is a fragmental longitudinal sectional view. Figs. fi, 5 and 6 are perspective views of several forms of hns constructed in accordance with the invention.

The size and shape of a radiating fin embodying features of my invention will vary with the number of heat-exchange tubes upon which it is to be mounted. The number of tubes may vary from one to as many as may be required for the purpose in hand. The present drawing shows several dierent forms of hns. Fig. d shows a n A of oblong form adapted to be mounted upon two tubes.. The n comprises a hollow body composed of thin sheet copper or other metal which is a good conductor of heat. For the saire of oiearness, the thickness of the metal has been much exaggerated in the drawing. The 'fin is composed of two substantially similar halves 1, these halves being of oblong rorm and being united at their perimeters in any preferred manner, as by folding the edges of one half to clamp the edges of the other, as shown at 2 in Fig. fi. The n is provided with annular (Cil. 257x136) flanges 3 to receive the heat-exchange tubes 4. These iianges are formed integral with the halves composing the body. The flanges upon one fin contact the flanges of adjacent fins and thus serve to space the iins apart uniformly upon the tubes 4. If desired, the sides of the body may be stiffened by pressing the sheet metal into the form of ribs 5 radiating from the anges 3.

in the form of iin shown in Fig. d, the hollow body is not sealed, but on the contrary, is formed @5 to permit air to ow through the nn. As illustrated in Fig. d, openings 6 are formed in each half of the body at its upper and lower edges so as to permit air to enter at one edge of the body and iiow out at the other. 7@

The fin B illustrated in Fig. 5 is similar to the nn A except that the body is sealed or substantially closed, instead of being provided with openings such as 6.

in Fig. 6 i have shown a form or" iin C which is 75 intended to be mounted upon a single tube andwhich may therefore be circular in form, as shown, if desired.

Fins embodying the features of my invention may be used in connection with heat-radiators, s@ refrigerators or coolers, and apparatus intended for either heating or cooling. Such radiators or cooling apparatus may partake of various forms and may be mounted in various ways in relation to the space to be warmed or cooled. It is common practice to place radiators on the floor, on the wall, or within the wall. Fins embodying my invention may be employed in connection with radiators mounted in any of these ways.

iin Figs. l, 2 and 3 have shown a radiator of 9g@ the vtype which is arranged to extend along the baseboard within a room. In the present embodiment of the invention, the body of the radiator comprises a bach wall i0, a short upwardly and forwardly inclined top wall 11, a forwardly and downwardly curved bottom wail i2 and end Walls 13. Within said body is a radiating unit composed of two headers la, two tubes 4 and a series of fins mounted upon said tubes and iilling m@ the space between the headers.

The fins may be secured to the heat exchange tubes d in any preferred manner, but preferably by submerging the lower portions of the fins after they have been assembled on the tubes, in a 105 bath of acid and then in a bath of molten solder or the like until the/annular anges E are approximately one-half submerged, capillary action serving to cause the solder to flow up around the flanges so as to unite them to the tubes. This n@ radiating unit -is mounted within the radiator body by means of a screw stud 15 secured to the rear end of each header 14 and extending through an opening in the lback Wall 12, and a nut 16 5 turned on the screw stud. The steam pipes 1'1 vat and 18 extend through openings in the end walls 13 and are screwed into the headers 14.

Air inlet openings are provided in the lower portion of the radiator body, as by means of a grid 19 attached to the forward edges of the bottom wall 12 and the end walls 13. This grid extends vertically and forms the lower portion of the front wall of the radiator body.

The radiator body is provided with outlet openingsby means of a grid 20 secured to the forward edges of the top wall 11 and the end walls 13. This grid extends forwardly and downwardly and constitutes the upper portion of the front of the radiator body.

The grids 19 and 20 extend to points adjacent I the radiating unit, the opening or space between the lower edge of the grid 20 and the upper edge of the grid 19 being closed by means of a removable cover 21. This opening extends longitudinally of and in front of the radiating unit. While the cover 21 may be mountediand held in place in various ways, I have herein shown the lower edge of the grid 20 as being bent to form a flange 22 which is the equivalent of a hook, the upper edge of the cover being similarly bent to form a hook 23. The upper edge of thegrid 19 is bent to provide a resilient locking flange 24. The lower edge of the cover 21 has a coacting locking flange 25 which may be sprung over the flange 24 to hold the cover in place.

As indicated by the dotted lines 26 in Fig. 2, the rear edges of the radiating ns are spaced from the back wall 10 and the front edges of the l ns are'spaced from the cover plate 21.

The radiator is supported above the oor by means of a plurality of feet 27 of any preferred form secured to the bottom wall 12.

In operation, heat is radiated from the tubes 4 through the fins, thus producing a flow of alr upwardly through the radiator body, the air entering the grid 19 and passing 'up through the spaces between the radiating fins and out through the grid 20.

Access may be had to the radating fins when it is desirable to brush off an accumulation of dust o r the like, by pulling the lower edge of the cover plate forwardly to Vdisengage it from the locking flange 24, whereupon the plate may be lifted out of engagement with the bent flange' 22.

It will be seen that the heat-conducting fins herein disclosed are rigid and light. Tests have shown them to be greatly superior in eiiiciency to fins of the prior art. Moreover, since the fins are soldered to the tube, there is no gradual loss of efliciency due to corrosion or dust entering spaces between the tube and the n, as in prior constructions.

The radiator shown in Figs. 1, 2 and 3 is much lighter and more velilcient than prior radiators of the sa'me type. The efficiency of the fins is so great that they may be made relatively small, thus allowing them to be spaced from all sides of the radiator body and thereby permitting a' freer flow of air than has been possible with prior constructions. T he removable cover plate 2l provides easy access to the radiating ns when dusting becomes desirable.

I claim' as my invention:

1. In a heat-exchange apparatus, a tube for the heating or cooling medium, and a series of hollow ns mounted on said tube, each iin having on each' side an annular ilange surrounding the tube and spacing the adjacent ns uniformly along the tube.

2. -A radiator comprising, in combination, a body comprising a sheet of metal bent to form rear, top and bottom walls, sheet-metal end walls permanently secured thereto, and a pair ,of grille members extending downwardly from the top wall and upwardly from the bottom wall respectively and permanently secured to the front edges thereof and to the end walls, the adjacent edges of said grille members being spaced from each other, a radiating unit comprising a tube and a series of radiating fins mounted Aon said tube, said unit being positioned within said body opposite the space between the adjacent edges of said grille members and being supported by said rear wall, and a cover plate for closing said'space comprising a sheet-metal member hooked to the edge of one of said grille members and having a detachable con nection with the edge of the other grille member.

3. A radiating n adapted to,be mounted on aV tube comprising a pair of sheet-metal dished members with their concavesides facing each other, said members having perimetral flanges extending outwardly from the dished portion and united in abutting lrelation to form a relatively stiff heavy portion at the perimeter of the fin, the dished portion of each member having an opening and an annular ange to ilt snugly over the tube, said annular flange extending from the convex side of the member, and stiffening ribs formed in the dished portion of e'ach member extending radially from said opening.

4. A radiating fin adapted to be mounted on a heat-exchange -tube comprising, in combination, a pair of dished members with their concave sides facing each other, each member being made Aof sheet metal and comprising a relatively at central portion, an angularly extending portion bordering 'said central portion, and a perimetral lflange abutting and rigidly secured to the flange on the other member, the angularly extending portions of both members being cut away along parts of the upper and lower edges to form openings to permit air to flow through the body but leaving the perimetral flanges intact to maintain the stiffness of the members. 

